Telegraph repeating system.



A. T. JBSTER.

TELBGRAPH REPEATING SYSTEM.

APPLICATION FILED MAY 12, 1913.

LMLQL ENHHIMTIVMIIIHM 1' @llillxiglsllllllll- Patented Nov. 10, 1914. l

. ffice tion.

y arrangement.

ALFREB T. JESTER, 0F HOUSTON, TEXAS.

TELEGRPH REPEATING SYSTEM.

Specification of Letters Patent.

Patented Nov. 10, 1914.

Application led May 12, 1913. Serial No. 767,080.

T0 all whom it may concern:

. Be it known that 1, ALFRED T. JEsTER, a citizen of the United States, residing at Houston, in .the county of Harris and State oit Texas, have invented a certain new and useful llmprovement in Telegraph Repeating Systems, ot which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specifica- My invention relates to telegraph repeaters and has for its object the provision ofan improved repeater adapted to repeat both ways. y n More particularly my invention contemplates the provision of a repeating device having a plurality of electromagnetic elements, each such element having a plurality of coils so arranged that one of the coils of each element when energized will attract the armature of its element, having however such a high resistance that the current necessary for the energization of this -coil will not be suiicient to attract or operatively energize any of the relay Sounders on the tele graph line. Each electromagnetic element then also has a further Winding, which winding is under the control of thesending keys, and which Winding when energized serving to attract the armature of the combined electromagnetic element to thereby retransmit the impulses toward the other end of the line.

1 will explain my invention more in detail by referrin to the`accompanying drawing setting orth two forms of carrying out my invention, in which- Figure 1 is a diagrammatic representation of my improved repeater showing its association with a telegraph line, and Fig. 2 is a modified form of the repeater circuit Referring more particularlygto Fig. 1, 1 show a repeating station Aas adapted to repeat messages between two oppositely eX- tending telegraph lines 1 and 2, respectively, Which telegraph lines of course are provided with a plurality of the ordinary series telegraph sets, one station only for each line however being shown, respectively B and C, Which serve tol indicate the character of the apparatus at each of such ordinary telegraph stations.. The telegraph line.

1' is provided with the. ordinary telegraph relay 3 which controls the customary sounder, not shown, the sending key 4and the short circuiting switch 5, this line being grounded at its extremity at 6. The telegraph line 2 is provided with similar apparatus consisting ot the relay 7, the .short circuiting switch 8, sending key 9, and is grounded at 10. At the repeating station l have two electromagnets respectively 11 and 12, the electromagnet 11 being provided with a coil 13 and a coil 14, and the electromagnet 12 being provided with a coil 15 and a coil 16. The electro-magnets 11 and 12 are provided with armatures 17 and 18 respectively under the control of the ordinary ductor 26 to the front contact 21 and the free terminal of the winding 14-extendsby means of the conductor 27 to the'front con tact 22. The free terminals of the windings 13 and 15 extend by means of conductors 28 and 29 respectively to the respective armatures of their electromagnets. The resistance of the windings 13 and 15 is such that when for instance the short circuiting switch 8 at station C is closed,

that the current traveling through this winding 15, for instance, is sufficient to energize the electromagnet 12 to attract its armature 18, but insulicient to operatively energize the relays I7. If the short circuiting switch is open, as for instance shown at station B, so that lthe circuit through the -line wire 1 is open, then of course no current passes through the winding 18 and the armature 17 remains unenergized. Assume then that the station B is intending to send signals, the yshort -circuiting .switch 5 isv opened but of course theshort circuiting .switch 8 of the line wire 2 is closed because that line wire is receiving. The circuit through the coil 15 then is closed from the ground 10, short circuiting switch 8, relay 7, line wire 2, coil 15, conductor 29, battery 24 to ground 30. This current," while it is sulicient to energize the winding 15, is unsuilicient to actuate the relay 7. The attraction of the armature 18 however has completed the circuit from the ground 30, through battery 24, armature 18, front contact 22, conductor 27, coil 14, to line wire 1, and from there through the sending key 4 to ground at 5 so that when the sending key 4 is actuated it energizes the winding 14 to thereby attract its armature 17 to thereby close a circuit from ground 31 through battery 23, armature 17, contact 21, conductor 26, winding 16, line wire 2, through thev telegraph sets of line wire 2 to ground at 10. In this manner the signals are repeated at the station A. The same action takes place but in a reverse order when station C is communicating to station B. The windings 13 and-14 as likewise the windings 15 and 16 are wound cumulatively. The winding 16 is of the ordinary resistance of the regular telegraph relay. From this it is thought the operation of my improved repea/ter will be entirely clear.

In Fig. 2, I have set forth a modification in which the free ,terminals of the windings p 13 and 15 respectively areled by conductors 32 and 33 respectively to the armatures 18 and 17 of the combined electromagnets so that both batteries 23 and 24 come into play during the signaling operation.

While I have herein `shown and particularly described two embodiments of my invention, I do not mean to limit myself to such description and illustration, but

Having thus described how my invention can be carried out, what I claim as new and desire to secure by Letters Patent is:

1. A telegraph repeating system consisting of two telegraph lines, an electromagnetic device for each line, each having two coils and an armature, the electromagnetic device for one line when actuated actuating its armature to establish a circuit to repeat impulses to the other telegraph line through one coil only of the electromagnetic device of said other telegraph line, the yother coil of said last electromagnetic device serving for relay energizing purposes and'being associated electrically with the telegraph line. 2. A telegraph repeating system consisting of two telegraph lines, an electromagnetic device for each line, each having two coils and an armature, the electromagnetic device for one line when actuated actuating its varmature `to establish a circuit to repeaty impulsesto the other telegraph line through one coil only of the electromagnetic device ot' said other telegraph line, the other coil of said last electromagnetic device serving for relay energizing purposes and being associated electrically with the telegraph line.

3. A telegraph repeating system consisting of two telegraph lines, an electromagnetic device foreach line having two coils, the electromagnetic device for one line having an armature to repeat impulses to the other telegraph line through a winding of the electromagnetic device of said other telegraph line, one of the windings of each electromagnetic device having a resistance suiicient to prevent energization of telegraph relays of its associated line, but sufcient ampere turns to attract its associated armature withsuch energization.

4. A telegraph repeating system consisting of two telegraph lines, an electromagnetic device for each line having two coils, the electromagnetic device for each line having an armature to repeat impulses to the other telegraph line through a winding of the electromagnetic device of said other telegraph line, and a battery for each line, one of the windings of each electromagnetic device having a resistance suticient to prevent energization of telegraph relays of its associated line, but sufficient ampere turns to attract its associated armature with such energization.

5. A telegraph repeating system consisting of two telegraph lines, an electromagnetic device for each line having two coils, the electromagnetic device for one line hav- `ing an armature to repeat impulses to the other telegraph line through a winding of the electromagnetic device of said other telegraph line, one of the windings of each electromagnetic device having a resistance suiicient to prevent energization of tele raph relays of its associated line,V but su cient ampere turns to attract itsl associated armature 'with such energization, each electromagnetic device havingan armature and a front contact, said front Contact being connected to a terminal of the second winding of each electromagnetic device.

6. A telegraph repeating system consisting of two telegraph lines, an electromagnetic device for each line having two coils, theA electromagnetic device for each line having an armature to repeat impulses to the other telegraph line through a winding of the electromagnetic device of said other telegraph line, and a battery for each line, one of the'windings of each electromagnetic device having a resistance sufficient to prevent energization of telegraph relays of its associated line, but suiiicient ampere turns to attract its associated armature with such energization. each electromagnetic devlce having an armature and a front contact,

`said :trent contact being connected to a terminal of the second winding of each electro- Vmagnetic device.

7. A telegraph repeating system consisting of two telegraph lines, an electromagnetic device for each line, each having two coils andan armature, the electromagnetic sov device for one line when actuated actuating maintain its associated armature in an atits armature to establish a circuit to repeat tracted position. 10 impulses to the other telegraph line through In Witness whereof, I hereunto subscribe one coil only, and the armature of the elecmy name this 3d day of May, A. D. 1913.

tromagnetic device of said other telegraph ALFRED T. JESTER. line, the other coil of said last mentioned Witnesses: electromagnetic device receiving its current S. M. HALVERTON,

over a telegraph line aforesaid serving to L. C. BRUEGGMANN. 

